Pumping jack



BEST AVMLABLE COP Nav. 2 1926.- 1,605,437 A v. l.. HUDSON l lUMPING JACK Filed Oct. 5. 1925 2 Sheets-Sheet 1 WITNESSES ATTORNEYS BESTAWLABLE Com V. L. HUDSON PUHPING JACK Filed Oct. 5. 1925 2 Sheets-Sheet 2 NVENTOR d l BY A5 ATTORNEYS ramene-e1926;, BESTAIILBLE. COPY 'rus Parent' OFFCES `ulaifrgiaze STA;

vmGrnrERoY-- HUDSON, oFvmLsA, OKLAHOMA, .iassIeNoRlor omi-HALF froy Amon i l BEST, oFfrULsa, oizrneinoiaa.-

rUivrrrNG Jack.

,This inyeiition. relates to van improvement .preventingwear of the polish rod and stufflingbox. i A further object'resides inthe provision `ofa devicefoffthis character .which is of f siinple, strong and` durable construction, reliable and effective/in .operation and easy and comparatively inexpensive to manufacif Other Aobjects and advantages reside in certain novel features of the construction, arrangement and combination of parts as Awill be'hereinaftermore fully described and particularly pointed out in the accompanying drawings 'forming'partof vthis specificationl and Vin which Figure 1 is avlew inside elevation showing afpump )ack constructed in accordance Ywith'th'e present' invention.. 5

Figures 2 and 3 are detail'lviews in front and side elevation respectively vlshowing the swingable hanger hook of pump jack.

Figure 4 is a plan view of the bearing for the hanger hook.

Figure 5 is a view thereof in longitudinal central vertical section, and

Figure 6 is a view thereof in front elevation.

Referring to the drawings the numeral 1 designates thel frame of the pump jack at the upper end of which bearings 2 are provided. Trunnions 3 carried by the block of a walking beam 4 are rotatably mounted in the bearing 2 of the frame whereby the walking beam is mounted for rocking movement about a fixed axis.

Means designated generally at M is provided for rocking or oscillating the walking beam and for a full disclosure of this means reference is made to Patent #1,211,529.

The present invention resides in the provision between the walking beam 4 and a polish rod 5 of motion transmission means of such a character that the rocking movement of the walking beam will be applied as a right line movement to the polish rod. For this purpose the outer end of the walking ftheP beaiing'f`-surfaces 9i The Ilow'e'r 'portion ofthe hook 'is-in the form Vof a yoke/'having curved arms'gl consti tu'ting theybillffof the hook; Recessed i il'iearing fs'urfaces? 14l i :are

Vformed in' "the farms `-13` 'and-'receive oppositely' :extending tru'nnions f14" fixed onf' and projecting laterally/from the sectionsof a vAn adjustable 7 abutment'fis pro'videdl for ably comprises an abut1nentplate"20 i3djustably secured ,-to *u shP-d Mac-keg. 2l

mounted between 4a'ndfixed to )the bars`4 of the walking beam. For adjustably securing the plate 2O to the bracket 21 a bolt and nut 22 is provided, the bolt extendin through a. bolt hole in the bracket an through a slot 23 in the plate 21.

The abutment plate 21 is secured in such position on its bracket 22 that the body portion of the hook engages the outer end of the plate 21 to limit its swinging movement toward the walking beam when the body portion 11 of the hook is in a vertical position and when the walking beam is in a horizontal position.

With this arrangement the rocking movement of the walking beam 4 is translated into a straight line vertical movement when 100 applied to the polish rod. The translation of this curvilinear motion of the walking beam into a rectilinear movement in the polish rod is effected by virtue of the fact that the hanger hook 10 swings to compen- 105 sate for the swinging of the walking beam during the phases of movement of the walking beam below its horizontal position. Above its horizontal position the outer end of the walking beam recedes slightly from 11" limiting theinward swinging movement! of 'the hanger hook vland this abutment'prefer- 'BEST AVAlLABLE COPW the polish rod butdue to the downward olii'- setting'o'f the arms 13 which connect with the trunnions 14 and also by virtue of the engagement yof the hook with the abutment the arms 13 still swing outwardly tof such an extent as to compensate for the`inwardswing of the outer end of the walking beam.

laterally but reciprocates vertical ,through its stufling box 19 arid wear on these'pa'rts is prevented. l

I claim;

1. A pump jack having a lWalking beam rockable about a ixed axis, a hanger hook swingably `mounted on the walking beam and adapted to-be connected to a polish rod, land an .abutment for limiting the swinging movement of the hook toward the walking bea-m.

2. A pump jack having ra walking 4beam irockable about a fixed axis, a hanger hook s wngably..mounted on lthe walking beam land adapted to be connecte'dto a polish rod, .and Yan l.abutment for limiting the swinging :movement of the hook toward the walking Abeam, said abutment comprising a bracket fixed on the Walking beam, a plate adjustable .onthe bracket and :means for fastening the A:plate-.in adjusted position -on the bracket.

Y 3. A pump jackhaving a walking beam .rockable about a fixed axis, va hanger hook swingably mounted on the walking beam and having curved arms constituting a bill and provided with bearing surfaces, and a clampadapted to be secured to a polish rod .and having trunnions engaged withthe bearing recesses of the arms.

4. A pump jack having a walking beam rockable about a fixed axis, a hanger hook tions of theghookaw;

and lhaving 'trunnions engaged :with .the bearing-.recesses-iof the arms and an adjustable j. M abutment for limiting the inward swinging In this way the polish rod 17 is not flexed movement of the hook toward the walking beam 5. A pumpjafckI-having a walking beam rockable about a fixedaxisjjlJ vhanger. hook ,having a frns'verelshjrft' x'edtfots' upper end and Sivingahlyim'qulted the walking beam ,andh'aving curved Iarms eonstituting'a a clamp adapted tofbefsecuredto vpolish rod :and having ftrunnrions engaged Wit the bearing recess'esof the ;,i'rmsg/fr l .6- 'A Pump; Jack having. a' `Walking beam rockable about' a ftixlixilylaxis,l a hanger hook l recesses ofthe arms. Y

7. yIn a puin walking beamQ; a

. kf, .tliagfmbnation 0f? pendent Sivilllgabl'nfiember pwoallyjaimerai'a'om'adaptationfaire beam and having'a bifurated;hook, and a polish .rodhavieg iaeralgpraectonssaid l rod= .disposed gin .sa1d`bifurca .tion arid flid lateral proj ection por- 

